AFTER MAKING A SPLICE IN A CONVEYOR BELT THE EE WAS RELEASING TENSION ON A SET OF COMEALONGS WHICH HAD BEEN USED TO GAIN SLACK IN THE BELT. THE COMEALONG BECAME STUCK ON A TOP BELT ROLLER. WHI LE ATTEMPTING TO FREE THE COMEALONG THE TOP ROLLER ""POPPED"" OUT & STRUCK EE IN THE CHEST.